Is there any way to use Playground to read and write .graphql files to a plain old directory? I've downloaded the stand-alone version and loaded a project with a valid .graphqlconfig file. So far so good. Except that I can't see any of my schema, and when I write new ones they don't get saved anywhere. Puzzled. Obviously I'm missing something.

If you load a folder with a valid config file, you should see the schema in the DOCS, and the environments in the left bar.